国产无套码AⅤ在线观看,福利午夜免费专区,日韩AV女优一区二区资源,av2018天堂网址,美女胸又大又黄又www网站,成年人啪啪啪视频

7 l?a ch?n c?ng ngh? cho ?? c?ng bánh xe

2014-06-28 1161

Abrasive hardness refers to the degree of difficulty of grinding wheel in the grinding force was dropping on the surface, how to select the grinding wheel hardness, small make up here to tell you.
1 grinding soft materials to choose grinding hard, grinding hard materials should choose soft grinding wheel;
2 cooling liquid grinding dry grinding wheel hardness and high 1~2 level;
3 grinding soft and toughness of non-ferrous metal, hardness should be too soft;
4 the end mill grinding wheel hardness than the circumference, should choose soft;
5 in the grinding under the same conditions, to a high of 1~2 small grade resin bond wheel than vitrified bond grinding wheel hardness;
6 grinding poor thermal conductivity material should be soft grinding wheel;
7 wheel rotation speed is high, the grinding wheel hardness optional soft 1~2 level.

涞源县| 荆州市| 于田县| 武山县| 屏东市| 酒泉市| 丽江市| 县级市| 宜章县| 文成县| 靖远县| 扎鲁特旗| 贺兰县| 巩义市| 天水市| 南宫市| 余江县| 镇原县|